When a team fakes a punt and throws the ball downfield, pass interference will not be called on the two outside defenders who are actually trying to block a coverage man from getting downfield and might not even know the ball has been thrown.

In order to reduce taunting and excessive celebrations, no player may remove his helmet while on the playing field except during timeouts, between quarters, and in the case of an injury. Violating the rule results in a 15-yard penalty. This is known as the "Emmitt Smith rule" after the Dallas Cowboys' running back's habit of taking his helmet off every time he scored a touchdown.